build(deps): bump rack from 2.2.7 to 2.2.9

Bumps [rack](https://github.com/rack/rack) from 2.2.7 to 2.2.9.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.7...v2.2.9)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -361,7 +361,7 @@ GEM
       semantic_puppet (~> 1.0)
     raabro (1.4.0)
     racc (1.7.0)
-    rack (2.2.7)
+    rack (2.2.9)
     rack-protection (3.0.2)
       rack
     rack-test (2.1.0)